Macbeth was used to go against the stereotypes one would expect of a Scottish lord. Although Macbeth was brave and courageous in the face of battle, he was too weak emotionally to follow through with his actions. At the beginning of the play, Macbeth believed that he should accept his rewards from King Duncan and that he should "dare to do all that a man can become" (III.vii.136). It was only when Lady Macbeth urged him to proceed with the act that Macbeth's personality changed. Macbeth's act of regicide transformed his attitude into paranoia and disillusionment. Shakespeare also expanded the play by using the name "Macbeth" as the main character. Shakespeare derived the name Macbeth from a historical king, King Mac Bethad. The play draws many parallels between Mac Bethad and Macbeth. King Mac Bethad led an army of soldiers who killed King Duncan and Mac Bethad was also killed by a person named Malcolm during an invasion of England. (Historical characters) Shakespeare modeled the royal actions of King Mac Bethad in his supernatural interpretation of the story. In the play, Macbeth's descent into cruelty proves to be an incredibly rapid change. After Macbeth learned of the witches' prophecies, he was determined to seize the throne and killed countless individuals to achieve this goal. His character change was not very subtle as the reader can draw comparisons